Major headline overseas. New and chilling images of that terror attack on a church in France and elderly priest brutally murdered. Tonight heavily armed police standing guard outside that church nicest taking responsibility. And to see being pulled Francis is now saying. This is war here's ABC's Alex what. Police moving in on the church shields up the two attackers inside with the hostages using them to block the door. One hostages seen being led to safety moments later the killers running out shot down by the police. The attackers had made the priest Neil one of the hostages said and performed a kind of sermon before stabbing him to death. Tonight ice is released video of the two teen attackers pledging allegiance one was nineteen years old and known to be authorities closely resembling this man the anti terror unit issued a search notice for the other identified as a Dell chairman each also nineteen who twice last year tried to go to Syria to fight. When carries try to go to Syria a second time he was jailed for ten months and then put into house arrest. Here at his family's home with a tracking bracelet he was always a lot out of the house four hours a day and in that window that he carried out this attack. Flying to Poland for world youth day the moon though they hope Francis saying the world is now at war. But insisting this terror is not part of a religious war. Terror that now France and the rest of Europe know we'll continue. Alex Marquardt ABC news sons it's into who've read friends.

This transcript has been automatically generated and may not be 100% accurate.

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